<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
        <!--需求 1：分别定义两个 div、span 标签，分别修改每个 div 标签的样式为：边框 1 个像素，实线，红色-->
        <div style="border: 1px solid red; width: 100px;height: 100px;background-color: green">div 标签 1</div>
        <div style="border: 1px solid red;">div 标签 2</div>
        <span style="border: 1px solid red;">span 标签 1</span>
        <span style="border: 1px solid red;">span 标签 2</span>

</body>
</html>